Sheath tube structure

Abstract

The utility model provides a sheathing canal structure. The sheathing canal structure comprises a sheathing canal, the sheathing canal comprises a bending adjusting section, a transition section and a supporting section which are connected in sequence, and the bending adjusting section has a preset space bending form; the handle assembly is in driving connection with the sheath tube; the traction wire assembly comprises a traction wire, and the two ends of the traction wire are connected with the sheathing canal and the handle assembly respectively, so that the handle assembly bends the sheathing canal through the traction wire. The problem that in the prior art, an adjustable bent catheter sheath is difficult to enter the coronary sinus is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and more particularly, to a sheath structure. Background Art

[0002] Cardiac interventional therapy is currently the main treatment method for heart diseases. Its advantages such as minimally invasive, precise treatment, rapid postoperative recovery, simple operation, and low psychological burden on patients have become the mainstream consensus.

[0003] In cardiac interventional therapy, the catheter sheath is an important tool for establishing a channel, delivering and retrieving instruments, etc. The catheter sheath is mainly divided into two types: a fixed-curve catheter sheath and an adjustable-curve catheter sheath. The fixed-curve catheter sheath is pre-processed into a certain angle during production according to the application scenario. Due to individual differences and possible changes in the physiological structure size after the lesion, the applicability of the fixed-curve catheter sheath is low and it is difficult to meet diverse needs. The adjustable-curve catheter sheath is a catheter sheath that the operator can adjust the angle within a certain range in real time during use through an adjustment mechanism. Compared with the fixed-curve catheter sheath, the adjustable-curve catheter sheath can adjust the angle to a certain extent and has a wider application range.

[0004] However, for relatively complex cardiac structures, such as the coronary sinus, the existing adjustable-curve catheter sheaths mostly have a planar bend. Due to the complex structure and individual differences of the human body, it is very difficult. The common planar bendable catheter sheaths have limitations and it is difficult to enter the coronary sinus, increasing the difficulty of cardiac surgery and prolonging the operation time.

[0005] As can be seen from the above, there is a problem in the prior art that the adjustable-curve catheter sheath is difficult to enter the coronary sinus. Summary of the Utility Model

[0006] The main purpose of the present utility model is to provide a sheath structure to solve the problem in the prior art that the adjustable-curve catheter sheath is difficult to enter the coronary sinus.

[0007] To achieve the above object, the present utility model provides a sheath structure, including: a sheath tube, the sheath tube includes a bending adjustment section, a transition section, and a support section connected in sequence, the bending adjustment section has a preset spatial bending shape; a handle assembly, the handle assembly is drivingly connected to the sheath tube; a traction wire assembly, the traction wire assembly includes a traction wire, and both ends of the traction wire are respectively connected to the sheath tube and the handle assembly, so that the handle assembly bends the sheath tube through the traction wire.

[0008] Further, the transition section has a fixed bending shape at a preset angle, the transition section and the support section are located in a first plane, the bending adjustment section is located in a second plane, and the first plane and the second plane are arranged at an angle.

[0009] Further, the angle α between the first plane and the second plane 1 satisfies: -45° < α1 <45°.

[0010] Further, the diameter r of the sphere where the bending adjustment section is located satisfies: 20 mm < r < 100 mm.

[0011] Further, the included angle α between the axis of the transition section and the support section 2 satisfies 0° < α 2 <80°.

[0012] Further, the transition section has a fixed bending shape at a preset angle. The transition section and the support section are located in a first plane, and the bending adjustment section is located in a second plane. The included angle α between the first plane and the second plane 1 is 15°; and / or the diameter r of the sphere where the bending adjustment section is located is 72 mm; and / or the included angle α between the axis of the transition section and the support section 2 is 25°.

[0013] Further, the traction wire assembly further includes a sleeve and a traction ring. The sleeve is arranged on the sheath tube, the traction wire is accommodated in the sleeve, the traction ring is sleeved on the bending adjustment section and located at the distal end of the bending adjustment section, and the traction ring is connected to the distal end of the traction wire for driving the bending adjustment section to bend.

[0014] Further, the sheath tube includes an inner layer, an intermediate layer and an outer layer from inside to outside, and the sleeve is arranged between the intermediate layer and the inner layer.

[0015] Further, the handle assembly includes: a housing; a bending adjustment mechanism arranged on the housing, the proximal end of the support section is connected to the housing, the bending adjustment mechanism is connected to the proximal end of the traction wire for adjusting the bending of the bending adjustment section; a hemostatic valve connected to the proximal end of the sheath tube for sealing the sheath tube.

[0016] Further, the sheath tube structure further includes a visualization ring sleeved on the distal end of the sheath tube.

[0017] Applying the technical solution of the present utility model, the sheath tube structure includes a sheath tube, a handle assembly and a traction wire assembly. The sheath tube includes a bending adjustment section, a transition section and a support section connected in sequence. The bending adjustment section has a preset spatial bending shape. The handle assembly is drivingly connected to the sheath tube. The traction wire assembly includes a traction wire, and both ends of the traction wire are respectively connected to the sheath tube and the handle assembly, so that the handle assembly adjusts the bending of the sheath tube through the traction wire. By setting the sheath tube as a bending adjustment section, a transition section and a support section connected in sequence, and setting the bending adjustment section to have a preset spatial bending shape, and connecting the traction wire to both the sheath tube and the handle assembly at the same time, and using the handle assembly to change the bending degree of the bending adjustment section. When the handle assembly adjusts the bending of the sheath tube, the bending adjustment section is in a spatial bending shape, so that the sheath tube can adapt to the structure of the coronary sinus, and thus can smoothly enter the coronary sinus, solving the problem that the adjustable bending catheter sheath in the prior art is difficult to enter the coronary sinus. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0019] Figure 1 shows a schematic structural diagram of a sheath tube structure in a specific embodiment of the present utility model; and

[0020] Figure 2 shows a schematic diagram of the spatial angle of a bending section in a specific embodiment of the present utility model;

[0021] Figure 3 shows Figure 2 a view from direction C of

[0022] Figure 4 shows a schematic diagram of the angle between a transition section and a support section in a specific embodiment of the present utility model;

[0023] Figure 5 shows a schematic structural diagram of a sheath tube in a specific embodiment of the present utility model;

[0024] Figure 6 shows a cross-sectional view of a sheath tube in a specific embodiment of the present utility model.

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 10. Sheath tube; 11. Bending section; 12. Transition section; 13. Support section; 14. Inner layer; 15. Intermediate layer; 16. Outer layer; 20. Handle assembly; 21. Housing; 22. Bending mechanism; 23. Hemostatic valve; 30. Traction wire assembly; 31. Traction wire; 32. Sleeve; 33. Traction ring; 40. Marking ring. Detailed implementation manners

[0027] It should be noted that, without conflict, the embodiments and features in the embodiments of this application may be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] It should be pointed out that unless otherwise specified, all technical and scientific terms used in this application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0029] In the present utility model, unless otherwise specified, the orientation terms such as "upper, lower, top, bottom" generally refer to the directions shown in the drawings or to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the respective components themselves, but the above orientation terms are not used to limit the present utility model.

[0030] Obviously, the above-described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work shall fall within the scope of protection of the present utility model.

[0031] To solve the problem that the adjustable bending catheter sheath in the prior art is difficult to enter the coronary sinus, the present utility model provides a sheath structure.

[0032] First of all, it should be noted that in this embodiment, the distal end is the end of the instrument away from the user, and the proximal end refers to the end of the instrument close to the user.

[0033] As Figures 1 to 5 shown, the sheath structure includes a sheath 10, a handle assembly 20 and a traction wire assembly 30. The sheath 10 includes a bending section 11, a transition section 12 and a support section 13 connected in sequence. The bending section 11 has a preset spatial bending shape. The handle assembly 20 is drivingly connected to the sheath 10. The traction wire assembly 30 includes a traction wire 31. The two ends of the traction wire 31 are respectively connected to the sheath 10 and the handle assembly 20, so that the handle assembly 20 bends the sheath 10 through the traction wire 31.

[0034] By setting the sheath 10 as a bending section 11, a transition section 12 and a support section 13 connected in sequence, setting the bending section 11 to have a preset spatial bending shape, connecting the traction wire 31 to both the sheath 10 and the handle assembly 20 at the same time, and using the handle assembly 20 to change the bending degree of the bending section 11, when the handle assembly 20 bends the sheath 10, the bending section 11 is in a spatial bend, so that the sheath 10 can adapt to the structure of the coronary sinus and thus can smoothly enter the coronary sinus.

[0035] In this embodiment, the transition section 12 has a fixed bending shape at a preset angle. The transition section 12 and the support section 13 are located in a first plane, and the bending section 11 is located in a second plane. The first plane and the second plane are arranged at an angle.

[0036] Specifically, the transition section 12 has a fixed bend at a certain angle. In this way, the sheath 10 can reach the vicinity of the lesion more easily. The transition section 12 and the support section 13 are located in the first plane, while the bending adjustment section 11 is located in the second plane. There is a certain angle between the two planes. At this time, the bending degree of the bending adjustment section 11 is adjusted through the handle assembly 20, so that the sheath 10 bends in the preset direction, and the sheath 10 can more easily enter different positions of the heart. After the bending adjustment is completed, the bending adjustment section 11 can provide spatiality for the sheath 10 inside the heart, and can adapt to the spatial structure of the heart. Moreover, in this setting method, when the distal end of the sheath 10 needs to be inserted into the lesion position, only need to insert the sheath 10 near the lesion, and then adjust the bending degree of the bending adjustment section 11, then the sheath 10 can smoothly enter the coronary sinus. When the sheath structure needs to be rotated, the bent shape after bending can adapt to the spatial structure of the coronary sinus, thus avoiding damage to the blood vessel wall and reducing the risk of surgery.

[0037] In this embodiment, the included angle α between the first plane and the second plane 1 satisfies: -45° < α 1 < 45°.

[0038] Specifically, as Figure 2 shown, an included angle α is formed between the first plane and the second plane 1 , and the second plane formed by the bending adjustment section 11 can be regarded as being bent and deviated from the first plane on the basis of the first plane, forming an included angle greater than -45° and less than 45°. Within this angle range, it is ensured that the sheath 10 can enter the coronary sinus along the blood vessel without damaging the blood vessel wall. It can be understood that the positive and negative of the included angle α 1 are relative to the second plane, that is, the positive and negative represent that the first plane is located on both sides of the second plane.

[0039] In this embodiment, the diameter r of the sphere where the bending adjustment section 11 is located satisfies: 20mm < r < 100mm.

[0040] Specifically, the bending adjustment section 11 has a preset spatial bending shape. Therefore, the bending adjustment section 11 can be regarded as a section of curve on the sphere. The sphere diameter r is greater than 20mm and less than 100mm. Within this range, the sheath 10 can meet the needs during actual use. If it is too long, it will have a certain impact on the blood vessel wall, and if it is too short, the bending adjustment section 11 cannot reach the lesion position after the sheath 10 enters the coronary sinus.

[0041] In this embodiment, the included angle α between the axes of the transition section 12 and the support section 13 2 satisfies 0° < α 2 < 80°.

[0042] Specifically, the transition section 12 is provided with a preset angle, and the axis of the transition section 12 is angled with respect to the axis of the support section 13 as Figure 4 shown. The first plane can be a vertical plane or a plane with a certain inclination angle, which is determined by the bending direction of the transition section 12. In this embodiment, the transition section 12 bends in the vertical direction, that is, the first plane is a vertical plane.

[0043] In a preferred embodiment, the included angle α between the first plane and the second plane 1 is 15°, the diameter r of the sphere where the bending section 11 is located is 72 mm, and the included angle α between the axis of the transition section 12 and the axis of the support section 13 2 is 25°.

[0044] As Figure 5 shown, the traction wire assembly 30 further includes a sleeve 32 and a traction ring 33. The sleeve 32 is disposed on the sheath 10. The traction wire 31 is received in the sleeve 32. The traction ring 33 is sleeved on the bending section 11 and located at the distal end of the bending section 11. The traction ring 33 is connected to the distal end of the traction wire 31 and is used to drive the bending section 11 to bend.

[0045] Specifically, the sleeve 32 has a hollow structure. The sleeve 32 is fixed on the sheath 10. The traction wire 31 is received in the sleeve 32. One end of the traction wire 31 is connected to the traction ring 33 sleeved on the distal end of the sheath 10, and the other end is connected to the handle assembly 20. By operating the handle assembly 20, the traction wire 31 is moved within the sleeve 32. Since the length of the traction wire 31 remains unchanged, the bending section 11 is bent accordingly.

[0046] As Figures 5 to 6 shown, the sheath 10 includes an inner layer 14, an intermediate layer 15, and an outer layer 16 from the inside to the outside. The sleeve 32 is disposed between the intermediate layer 15 and the inner layer 14.

[0047] Specifically, the inner layer 14 is a polymer material with a low friction coefficient, such as high-density polyethylene or polytetrafluoroethylene, so as to reduce the resistance of the inner layer 14 to the device. The middle layer 15 is a metal material with anti-kink performance, which can keep the shape of the sheath tube 10 from being flattened. In this embodiment, the middle layer 15 is made of stainless steel wire and nickel-titanium alloy wire, and the outer layer 16 is made of polyester material. Of course, the middle layer 15 can also be made of other materials such as nickel-titanium alloy wire, which can be selected according to actual needs. During use, only the bending section 11 is bent, while the transition section 12 and the support section 13 do not need to be bent. Therefore, the portion of the outer layer 16 located at the bending section 11 is lower than that of the transition section 12 and the support section 13. The support section 13 needs to ensure that the connection between the sheath 10 and the handle assembly 20 is straight and bear the weight of the entire sheath 10. Therefore, in order to ensure that the support section 13 does not bend after being stressed, the outer layer 16 at the support section 13 has the highest hardness. The sleeve 32 is located between the middle layer 15 and the inner layer 14. Optionally, a receiving groove for accommodating the sleeve 32 may be provided on the inner layer 14, and the middle layer 15 is wrapped around the inner layer 14, thereby fixing the sleeve 32 on the inner layer 14.

[0048] like Figures 1 to 4 As shown, the handle assembly 20 includes a housing 21, a bending adjustment mechanism 22 and a hemostatic valve 23. The bending adjustment mechanism 22 is disposed on the housing 21, the proximal end of the support segment 13 is connected to the housing 21, and the bending adjustment mechanism 22 is connected to the proximal end of the traction wire 31 for bending the bending adjustment segment 11. The hemostatic valve 23 is connected to the proximal end of the sheath tube 10 for sealing the sheath tube 10.

[0049] Specifically, the bending adjustment mechanism 22 is disposed on the outer shell 21 and can rotate relative to the outer shell 21. One end of the bending adjustment mechanism 22 is connected to the traction wire 31. In the present embodiment, the traction wire 31 is used to adjust the bending section 11 to bend by rotating the bending adjustment mechanism 22. In another optional embodiment of the present application, the bending adjustment mechanism 22 can move axially relative to the outer shell 21, and the traction wire 31 drives the bending section 11 to bend by axially moving the bending adjustment mechanism 22.

[0050] Furthermore, the hemostatic valve 23 is connected to the supporting section 13. Optionally, the supporting section 13 and the hemostatic valve 23 are fixed by hot melting or gluing. In the present embodiment, the hemostatic valve 23 is an injection molding structure, so that the hemostatic valve 23 has good strength and stability, and can meet the assembly requirements and usage requirements. The hemostatic valve 23 can prevent the blood in the blood vessel from overflowing from the body, reduce blood loss, and reduce the difficulty of surgical operation, and can also prevent the gas outside the body from entering the blood vessel, thereby reducing the risk of surgery.

[0051] like Figure 5 As shown, the sheath tube structure further includes a developing ring 40 , which is sleeved on the distal end of the sheath tube 10 .

[0052] Specifically, the imaging ring 40 is sleeved on the sheath tube 10. Through the imaging ring 40, it is convenient for doctors to observe whether the position of the sheath tube 10 reaches the lesion position during the operation through CT or ultrasound. In this embodiment, the imaging ring 40 is sleeved on the distal end of the sheath tube 10, that is, sleeved on the bending adjustment section 11. Optionally, there are multiple imaging rings 40, and the multiple imaging rings 40 are respectively sleeved on the bending adjustment section 11, the transition section 12, and the support section 13, so as to facilitate doctors to more clearly see the position of the sheath tube 10.

[0053] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: By setting the sheath tube structure including the sheath tube 10, the handle assembly 20, and the traction wire assembly 30, the sheath tube 10 includes a bending adjustment section 11, a transition section 12, and a support section 13 connected in sequence. The bending adjustment section 11 has a preset spatial bending shape. The handle assembly 20 is drivingly connected to the sheath tube 10. The traction wire assembly 30 includes a traction wire 31. Both ends of the traction wire 31 are respectively connected to the sheath tube 10 and the handle assembly 20, so that the handle assembly 20 bends the sheath tube 10 through the traction wire 31. By setting the sheath tube 10 as a bending adjustment section 11, a transition section 12, and a support section 13 connected in sequence, the bending adjustment section 11 is set to have a preset spatial bending shape, and the traction wire 31 is connected to both the sheath tube 10 and the handle assembly 20 at the same time. By using the handle assembly 20 to change the bending degree of the bending adjustment section 11, when the handle assembly 20 bends the sheath tube 10, the bending adjustment section 11 is in a spatial bending state, so that the sheath tube 10 can adapt to the structure of the coronary sinus, and thus can smoothly enter the coronary sinus.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] It should be noted that the terms "first", "second", etc. in the description, claims, and drawings of the present application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0056] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A sheath tube structure, characterized in that: include: A sheath tube (10), the sheath tube (10) comprising a bending adjustment section (11), a transition section (12) and a support section (13) connected in sequence, the bending adjustment section (11) having a preset spatial bending shape; A handle assembly (20), the handle assembly (20) being drivingly connected to the sheath tube (10); A traction wire assembly (30), the traction wire assembly (30) comprising a traction wire (31), the two ends of the traction wire (31) being respectively connected to the sheath tube (10) and the handle assembly (20), so that the handle assembly (20) can bend the sheath tube (10) through the traction wire (31).

2. The sheath tube structure according to claim 1, characterized in that: The transition section (12) has a fixed bending shape at a preset angle, the transition section (12) and the support section (13) are located in a first plane, the bending adjustment section (11) is located in a second plane, and the first plane and the second plane are arranged at an angle.

3. The sheath tube structure according to claim 2, characterized in that: An included angle α1 between the first plane and the second plane satisfies: -45°<α1<45°.

4. The sheath tube structure according to claim 1, characterized in that: The diameter r of the sphere where the bending section (11) is located satisfies: 20 mm <r<100mm。 5. The sheath tube structure according to claim 1, characterized in that: An included angle α2 between the axes of the transition section (12) and the support section (13) satisfies 0°<α2<80°.

6. The sheath tube structure according to claim 1, characterized in that: The transition section (12) has a fixed bending shape with a preset angle, the transition section (12) and the supporting section (13) are located in a first plane, the bending adjustment section (11) is located in a second plane, and the angle α1 between the first plane and the second plane is 15°; and / or The diameter r of the sphere where the bending section (11) is located is 72 mm; and / or The angle α2 between the axes of the transition section (12) and the support section (13) is 25°.

7. The sheath tube structure according to claim 1, characterized in that: The traction wire assembly (30) further comprises a sleeve (32) and a traction ring (33); the sleeve (32) is arranged on the sheath tube (10); the traction wire (31) is accommodated in the sleeve (32); the traction ring (33) is sleeved on the bending adjustment section (11) and is located at the distal end of the bending adjustment section (11); the traction ring (33) is connected to the distal end of the traction wire (31) and is used to drive the bending adjustment section (11) to bend.

8. The sheath tube structure according to claim 7, characterized in that: The sheath tube (10) comprises, from inside to outside, an inner layer (14), an intermediate layer (15) and an outer layer (16), and the sleeve (32) is arranged between the intermediate layer (15) and the inner layer (14).

9. The sheath tube structure according to claim 1, characterized in that: The handle assembly (20) comprises: Housing (21); A bending adjustment mechanism (22), wherein the bending adjustment mechanism (22) is arranged on the housing (21), the proximal end of the support section (13) is connected to the housing (21), and the bending adjustment mechanism (22) is connected to the proximal end of the traction wire (31) for adjusting the bending adjustment section (11); A hemostatic valve (23), the hemostatic valve (23) is connected to the proximal end of the sheath tube (10) and is used to seal the sheath tube (10).

10. The sheath tube structure according to any one of claims 1 to 9, characterized in that: The sheath tube structure further comprises a developing ring (40), wherein the developing ring (40) is sleeved on the distal end of the sheath tube (10).

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